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Java Source Code / Java Documentation » RSS RDF » Jena 2.5.5 » com.hp.hpl.jena.reasoner.rulesys.impl   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    com.hp.hpl.jena.reasoner.rulesys.impl.RuleClauseCode RuleClauseCode public class RuleClauseCode (Code) Object used to hold the compiled bytecode stream for a single rule clause. This uses a slightly WAM-like code stream but gluing of the clauses together into disjunctions is done in the interpreter loop so a complete predicate is represented as a list of RuleClauseCode objects. author:    Dave Reynolds version:    $Revision: 1.12 $ on $Date: 2008/01/02 12:06:16 $ Inner Class :static class CompileState Inner Class :static class TermIndex Field Summary final public static  byte ALLOCATE      final public static  byte CALL_BUILTIN      final public static  byte CALL_PREDICATE      final public static  byte CALL_PREDICATE_INDEX      final public static  byte CALL_TABLED      final public static  byte CALL_TRIPLE_MATCH      final public static  byte CALL_WILD_TABLED      final public static  byte CLEAR_ARG      final public static  byte CLEAR_TEMP      final public static  byte CLEAR_VARIABLE      final public static  byte GET_CONSTANT      final public static  byte GET_FUNCTOR      final public static  byte GET_TEMP      final public static  byte GET_VARIABLE      final public static  byte LAST_CALL_PREDICATE      final public static  byte MAKE_FUNCTOR      final public static  int MAX_ARGUMENT_VARS      The maximum number of argument variables allowed in a single goal Future refactorings will remove this restriction. final public static  int MAX_PERMANENT_VARS      The maximum number of permanent variables allowed in a single rule clause. final public static  int MAX_TEMPORARY_VARS      The maximum number of temporary variables allowed in a single rule clause. final public static  byte PROCEED      final public static  byte PUT_CONSTANT      final public static  byte PUT_DEREF_VARIABLE      final public static  byte PUT_NEW_VARIABLE      final public static  byte PUT_TEMP      final public static  byte PUT_VARIABLE      final public static  byte TEST_BOUND      final public static  byte TEST_UNBOUND      final public static  byte UNIFY_TEMP      final public static  byte UNIFY_VARIABLE      protected  Object[] args      protected  byte[] code      public static  RuleClauseCode returnCodeBlock      protected  Rule rule      protected  int[] termStart      Constructor Summary public   RuleClauseCode(Rule rule)      Constructor. Method Summary public  void compile(LPRuleStore ruleStore)      Compile the rule into byte code. public  Object[] getArgs()      Return the argument vector associated with this clauses' byte codes. public  byte[] getCode()      Return the byte code vector for this clause. public  Rule getRule()      Return the rule from which this code block was compiled. public static  void main(String[] args)      Debug support - not unit testing. public  void print(PrintStream out)      public  int termIndex(int pc)      Translate a program counter offset to the index of the corresponding body term (or -1 if a head term or a dummy rule). public  String toString()      Print clause as rule for tracing. Field Detail ALLOCATE final public static byte ALLOCATE(Code) Allocate a new environment frame CALL_BUILTIN final public static byte CALL_BUILTIN(Code) call a built-in operation defined by a rule clause (clauseIndex( CALL_PREDICATE final public static byte CALL_PREDICATE(Code) call a predicate code object (predicateCodeList) CALL_PREDICATE_INDEX final public static byte CALL_PREDICATE_INDEX(Code) call a predicate code object with run time indexing (predicateCodeList) CALL_TABLED final public static byte CALL_TABLED(Code) call a table code object () CALL_TRIPLE_MATCH final public static byte CALL_TRIPLE_MATCH(Code) call a pure triple match (predicate) CALL_WILD_TABLED final public static byte CALL_WILD_TABLED(Code) call a table code object from a wildcard () CLEAR_ARG final public static byte CLEAR_ARG(Code) reset an argument to an unbound variable (Ai) CLEAR_TEMP final public static byte CLEAR_TEMP(Code) reset a temp variable to an unbound variable (Ti) CLEAR_VARIABLE final public static byte CLEAR_VARIABLE(Code) reset a permanent variable to an unbound variable (Yi) GET_CONSTANT final public static byte GET_CONSTANT(Code) fetch constant argument (const, Ai) GET_FUNCTOR final public static byte GET_FUNCTOR(Code) deconstruct a functor argument (functor) GET_TEMP final public static byte GET_TEMP(Code) fetch temporary variable argument (Ti, Ai) GET_VARIABLE final public static byte GET_VARIABLE(Code) fetch permanent variable argument, first occurance (Yi, Ai) LAST_CALL_PREDICATE final public static byte LAST_CALL_PREDICATE(Code) variant on CALL_PREDICATE using the last call optimization, only current used in chain rules MAKE_FUNCTOR final public static byte MAKE_FUNCTOR(Code) create a functor object from a rule template (templateFunctor) MAX_ARGUMENT_VARS final public static int MAX_ARGUMENT_VARS(Code) The maximum number of argument variables allowed in a single goal Future refactorings will remove this restriction. MAX_PERMANENT_VARS final public static int MAX_PERMANENT_VARS(Code) The maximum number of permanent variables allowed in a single rule clause. Now only relevent for initial holding clause. MAX_TEMPORARY_VARS final public static int MAX_TEMPORARY_VARS(Code) The maximum number of temporary variables allowed in a single rule clause. PROCEED final public static byte PROCEED(Code) return from a call, proceeed along AND tree PUT_CONSTANT final public static byte PUT_CONSTANT(Code) put constant value into call parameter (const, Ai) PUT_DEREF_VARIABLE final public static byte PUT_DEREF_VARIABLE(Code) put a dereferenced permanent variable into call parameter ready for BUILTIN call (Yi, Ai) PUT_NEW_VARIABLE final public static byte PUT_NEW_VARIABLE(Code) put permanaent variable into call parameter, first occurance (Yi, Ai) PUT_TEMP final public static byte PUT_TEMP(Code) put temp variable into call parameter (Ti, Ai) PUT_VARIABLE final public static byte PUT_VARIABLE(Code) put permanaent variable into call parameter (Yi, Ai) TEST_BOUND final public static byte TEST_BOUND(Code) Test if an argument is bound (Ai) TEST_UNBOUND final public static byte TEST_UNBOUND(Code) Test if an argument is unbound (Ai) UNIFY_TEMP final public static byte UNIFY_TEMP(Code) fetch temporary variable argument, later occurance (Ti, Ai) UNIFY_VARIABLE final public static byte UNIFY_VARIABLE(Code) fetch permanent variable argument, later occurance (Yi, Ai) args protected Object[] args(Code) Any Object argements needed by the byte codes code protected byte[] code(Code) The byte code sequence returnCodeBlock public static RuleClauseCode returnCodeBlock(Code) Dummy code block which just returns rule protected Rule rule(Code) The rule from which is code was derived termStart protected int[] termStart(Code) starting byte code offset for body terms Constructor Detail RuleClauseCode public RuleClauseCode(Rule rule)(Code) Constructor. Parameters:   rule - the rule to be compiled Method Detail compile public void compile(LPRuleStore ruleStore)(Code) Compile the rule into byte code. Parameters:   ruleStore - the store of LP rules through which calls to other predicatescan be resolved. getArgs public Object[] getArgs()(Code) Return the argument vector associated with this clauses' byte codes. getCode public byte[] getCode()(Code) Return the byte code vector for this clause. getRule public Rule getRule()(Code) Return the rule from which this code block was compiled. main public static void main(String[] args)(Code) Debug support - not unit testing. print public void print(PrintStream out)(Code) Debug helper - list the code to a stream termIndex public int termIndex(int pc)(Code) Translate a program counter offset to the index of the corresponding body term (or -1 if a head term or a dummy rule). toString public String toString()(Code) Print clause as rule for tracing. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)